In the ancient tales, the Sacred Guardians known as Shalen stood against four otherworldly beasts, wielding the elements of fire, metal, water, wood, and earth. Despite their valor, the beasts proved too formidable until the discovery of a new weapon, the wind spell. With this magic, the spirits of the beasts were bound, restoring peace to the realm of humans. From that moment on, those marked with a special insignia on their hand are chosen as Shalen, sworn to safeguard all. Among them is Lang Ming, a young blind boy with extraordinary hearing, residing in Xiaoyanggang with his mother. When their town falls under demon attack and his mother vanishes, Lang embarks on a quest for her, striking a pact with a mysterious girl he dubs Little Goblin. Thus begins an awe-inspiring journey that will irrevocably alter Lang Ming's destiny.